/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.metrics.metricsets.jvm;

import org.apache.iotdb.metrics.AbstractMetricService;
import org.apache.iotdb.metrics.metricsets.IMetricSet;
import org.apache.iotdb.metrics.utils.MetricLevel;
import org.apache.iotdb.metrics.utils.MetricType;

import java.lang.management.CompilationMXBean;
import java.lang.management.ManagementFactory;

/**
 * This file is modified from io.micrometer.core.instrument.binder.jvm.JvmCompilationMetrics
 */
public class JvmCompileMetrics implements IMetricSet {
    @Override
    public void bindTo(AbstractMetricService metricService) {
        CompilationMXBean compilationBean = ManagementFactory.getCompilationMXBean();
        if (compilationBean != null && compilationBean.isCompilationTimeMonitoringSupported()) {
            metricService.createAutoGauge(
                    "jvm_compilation_time_ms",
                    MetricLevel.IMPORTANT,
                    compilationBean,
                    CompilationMXBean::getTotalCompilationTime,
                    "compiler",
                    compilationBean.getName());
        }
    }

    @Override
    public void unbindFrom(AbstractMetricService metricService) {
        CompilationMXBean compilationBean = ManagementFactory.getCompilationMXBean();
        if (compilationBean != null && compilationBean.isCompilationTimeMonitoringSupported()) {
            metricService.remove(
                    MetricType.AUTO_GAUGE, "jvm_compilation_time_ms", "compiler", compilationBean.getName());
        }
    }
}
